Copy letter from Herbert Rix, to the Cambridge Engraving Company, Cambridge 'Dear Sirs, I had forgotten the hitch which occurred about Prof. Bower's plates, so that you are only responsible for three months instead of five, but I think I am right about Mr Heape's plates, and that these have been in hand for nearly eight months. I am glad that we are to have proofs at last! I find that I misunderstood Dr Foster about Miss Greenwood's plate, so do not trouble further about that. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 12 April 1894